Carbon paper



Patented Jan. 16, i934 l v u UNITED STATES PATENT. orinar.

cannon PAPER. William E. Clarke, Toronto, Ontario, Canada Application September 6, 1932, Serial No. 631,902, and in Canada July 15, 1932 l Claim. (Cl. 282-48) The invention relates to improvements in car- It is of course understood that while this unf bon paper as described in the present specificacoated marginal piece is described hereinbefore tion and shown in the accompanying drawing as being at one end of the completed sheet of that forms a part of the same. carbon paper it may lie at either side of said One object of the invention is to effect economy sheet if such a method of manufacture be em- 6C in time and labour in the taking of carbon copies ployed as to render this practical. of original work, or the spacing of work sheets, The body of the carbon, or interleaving, sheet oy the provision of means whereby any number of is cut away substantially opposite to the uncoated sheets of carbon paper, or spacing sheets,l may edge l, as indicated by the numeral 3, so as to be removed simultaneously, and without thel leave the registering portions of the work sheets 65 necessity of handling the work sheets individually. unspaced whereby when such portions of the A further object of the invention is the prowork sheets are grasped the carbon, or interleavvision of means whereby in the process of intering, sheets may be withdrawn by simply pulling leaving the carbon sheets any misalignment of on the uncoated projecting marginal piece l. the carbon or work sheets will be instantly The carbon sheet is provided with one, or more, 79 apparent. sight openings, or windows, so that in the process A still further object is to provide a sheet of of interleaving the sheets any misalignment of carbon paper having an uncoated portion wheresaid sheets will be instantly apparent through oy the sheet may be handled without the hands said openings and can be corrected. In Figures of the user coming into contact with the coated l and 2 of the drawing this aligning means com- 75 portion, thereby prolonging the life of the carbon prises a singlel opening i through the sheet, parpaper as well as avoiding the soiling of the tially within the body oi same and partially withhands and the s mudging oi the work sheets. in the marginal piece, while in Figure 3 the op- In the drawing Figure 1 is a plan view of my posite edges of the sheet are cut away, as at 5, to

improved carbon sheet. permit of aligning the worlr sheets, but it is of 3e Figure 2 is a view illustrating the method of course apparent that any desired number of withdrawing a sheet of carbon paper from two such openings may be employed and that same work sheets between which it 'is shown in said may be positioned where desired.

' In the operation of the invention the carbon,

view. Figure 3 is a plan view of one end of a carbon or spacing, sheets are placed between the work 85 sheet showing a modified construction. sheets in the ordinary way and proper alignment Like numerals of reference indicate corredetermined by means of the opening, or openings, spending parts in the various iigures. d, or 5, land the whole then placed in a typewriter,

In the usual method of manufacturing carbon or other machine. Upon the completion of the paper the paper is passed over a roller operating work the carbon sheets are removed simultane- 90 in a vat containing the material with which the ously by simply grasping the work sheets with paper is to be treated and this roller is wiped by one hand at the point where the carbon sheets spaced mechanical means to provide a coated are cut away and pulling on the marginal piece, or body on the sheet oi paper of a width correspondpieces, of the carbon sheets with the other hand.

Y ing to the length of two sheets of carbon paper What I claim is1 95 when the original sheet is cut centrally, the por- A reproducing sheet designed to be interposed tions left uncoated at each side of said body between two work sheets, said reproducing sheet constituting marginal pieces, of which there will havinga portion cut away from its reproducing be one at one end of each sheet after the paper area adjacent to the top end thereof, the repronas been cut into sheets. Heretofore it has been ducing sheet having a plain margin extension 100 the CUSOm upon the COmpleiOn 0f the coating adapted tovproiect beyond the edges of the work prOeSS t0 trim Off this marginal piece but in the sheets, said reproducing sheet being formed withpresent invention such marginal piece, indicated in. its margin with an opening including a part by the numeral 1, is left integral with the body 2 at least of the plain margin to thereby expose a and provides a tab which is adapted to project portion of the edges of each of the underlying beyond the WOrk Sheet whereby the sheet of work sheets which would otherwise be covered Carbon papel may be grasped for interleaving, 0r by the reproducing sheet, whereby to determine withdrawal from the work sheets, without the the alignment of the edges of the work sheets by necessity of touching the coated body 0i the their exposure through said opening. sheet. WILIJZAM E. CLARKE. 110 

